• Line an 8"x8" tin with non stick baking paper.
• Grind the oats in a food processor or blender until they are a course flour like texture.
• Beat the butter and brown sugar together. Add the vanilla and beat.
• Add half the condensed milk and oat flour and beat in.
• Repeat with the remain oat flour and condensed milk.
• Stir in the chocolate chips.
• The mixture will be quite stiff and sticky.
• Spread into the prepared baking tin and place in the fridge for 1 hour.

Topping;

• Melt the chocolate and milk (or cream) together.
• Spread over the cookie dough and place in the fridge for at least a further 2 hours.